Your Professional Outboard Thermostat Supplier
Hangzhou Starwave Technology Co., Ltd. is a professional enterprise focusing on the full-range supply of outboard motor parts. Its core competitiveness comes from our own physical factory-a precision manufacturing base with decades of experience in manufacturing core components of internal combustion engines.We are highly compatible with nearly 100 models of global mainstream outboard motor brands such as Mercury, Yamaha, Suzuki and Honda, and our services cover diverse customer groups including professional repair shops, equipment distributors and overseas traders.
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6DA-12411-01 Yamaha Outboard F150 F175 F200 Thermostat Ou...
Horsepower: F150 F175 F200
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67F-12411-0 Thermostat for Yamaha F75 F80 F90 F150 Outboa...
OE-quality 67F-12411-0 thermostat for Yamaha F75, F80, F90, F150, F200 outboards. 60°C ±2°C calibration, 304 stainless steel spring. IATF16949 certified factory. MOQ from 10 pcs, worldwide shipping.
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6FM-12411-00 Thermostat for Yamaha Outboard 20HP 25HP 4 S...
Horsepower: 20HP 24HP 25HP
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60V-12411-00 Thermostat for Yamaha 8HP–450HP 833072003
Horsepower: 8HP–450HP
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833072003 Thermostat for Mercury 115-250HP Outboard
Horsepower: 75-175HP
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8M6010301 Thermostat for Mercury Outboard 115HP 4 Stroke ...
Horsepower: 115HP
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9-43014 18-3549 Thermostat for Mercury 6-125 HP Outboard
Horsepower: 6-125 HP
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353-01030-0 Thermostat for Tohatsu Nissan 40HP 50HP 60HP ...
Horsepower: 40HP 50HP 60HP 70HP
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3C7-01030-0 Thermostat for Tohatsu Nissan 60 70 75 90 115...
Horsepower: 60HP 70HP 75HP 90HP 115HP 120HP 140HP
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19300-ZW9-003 Thermostat for Honda Marine BF 8-225HP Outb...
Horsepower: 8-225HP
Why Choose Us
R&D Team
The R&D center of Hangzhou Starwave Technology Co., Ltd. is built around a highly skilled technical team, featuring a structure characterized by senior leadership combined with deep professional specialization, ensuring strong technical expertise, efficient innovation, and the ability to develop high-quality products that meet international market standards.
Our Service
We provide dedicated one-on-one technical support, with our professional technical team available 24/7 and a guaranteed response time of within 2 hours, ensuring efficient communication, rapid problem resolution, and reliable support throughout the entire cooperation process.
Our Certificate
As a national high-tech enterprise, we hold IATF 16949 and ISO 9001 system certifications, along with multiple patents, demonstrating our strong commitment to quality management, technological innovation, and industry-leading standards.
Production Market
Our products are exported to a wide range of international markets, including South American countries such as Brazil and Argentina, Southeast Asian countries, African nations, Europe, and the United States, reflecting our strong global reach and the trust of customers worldwide.
Advantages of Outboard Thermostat
Optimal Engine Performance: The thermostat plays a vital role in regulating the engine’s temperature, ensuring it operates within the optimal temperature range, which is crucial for achieving the best fuel efficiency and power output. A well-maintained thermostat helps the engine reach its operating temperature quickly and maintains it consistently, enhancing overall performance.
Prevention of Overheating: Overheating can cause significant damage to an engine, including the warping of components and the breakdown of engine oil. A functioning thermostat helps prevent overheating, protecting the engine against the detrimental effects of excessive heat.
Extended Engine Life: By maintaining the correct operating temperature, a thermostat helps reduce the wear and tear on engine components, significantly extending the engine’s lifespan by minimizing the expansion and contraction of parts that can lead to mechanical failures.
Improved Fuel Efficiency: Engines that run too cold can experience poor fuel combustion, leading to increased fuel consumption and higher emissions. A properly functioning thermostat ensures the engine warms up to an efficient operating temperature, optimizing fuel combustion and improving fuel efficiency.
Reduced Emissions: Operating an engine within its designed temperature range is essential for minimizing harmful emissions. A functioning thermostat helps maintain the correct temperature, enabling the engine to burn fuel more completely and efficiently, thus reducing the output of pollutants.
Product Paramenters
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Technical Data for 60V-12411-00 outboard thermostat |
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OEM |
60V-12411-00 |
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Specification: |
OPERATING TEMPERATURE: 122°F / 50°C |
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Replaces: |
Product Type: Ignition Key Switch / Specifications: / Replaces: / Oem Interchange Part Number : |
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Sierra Marine:18-3525;Yamaha 60V-12411-0000 68V-12411-0000; Mercury 881429 |
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Applications: |
This Item Fits Various Applications By Part Number. Please Check Your Part Number To Ensure Fitment. / Make & Model(S): |
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Yamaha models 8HP–450HP |
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Source: |
Aftermarket |
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Original: |
Lishui, China |
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Payment term: |
TT, LC |
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Delivery date: |
Negotiable |
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Packing: |
Export standard |
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Market: |
Asia/South America/Europe |
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Replaces: |
Product Type: Ignition Key Switch / Specifications: / Replaces: / Oem Interchange Part Number : 5005801 175974 |
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Applications: |
This Item Fits Various Applications By Part Number. Please Check Your Part Number To Ensure Fitment. / Make & Model(S): |
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Compatible with OMC Johnson Evinrude 40-200HP Outboard Motors |
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Source: |
Aftermarket |
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Original: |
Lishui, China |
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Payment term: |
TT, LC |
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Delivery date: |
Negotiable |
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Packing: |
Export standard |
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Market: |
Asia/South America/Europe |

Cold Start: Water is pumped into the engine block but the thermostat blocks it from exiting, forcing it to circulate internally until the engine reaches optimal heat (around 160°F/70°C).
Warming Up: As the engine block heats, a wax element inside the thermostat (vernatherm) expands, pushing the valve open.
Normal Operation: The opened thermostat allows hot water to flow out of the engine's top into the exhaust, while the water pump brings in cooler water to replace it, maintaining a stable temperature.
Stuck Open/Closed: A failed thermostat can stick open (engine runs too cold, poor performance, rich fuel mix) or stuck closed (engine overheats quickly, causing severe damage).
Regular Service of Outboard Thermostat
Overheating Prevention
An improperly functioning thermostat can lead to engine overheating, causing severe damage.
Fuel Efficiency
A well-regulated engine temperature ensures optimal fuel combustion, leading to better fuel efficiency.
Engine Longevity
Regular servicing helps in identifying issues early on, increasing the engine's lifespan.
Performance
A consistent engine temperature ensures peak performance at all times.
While you can wait for warning signs to appear, the best time to replace your outboard thermostat is before major problems arise. The marine environment is incredibly harsh. Saltwater, sediment, and mineral deposits constantly flow through your engine's cooling system.
Over time, these elements can cause the internal components of your thermostat to corrode and scale, leading to sticking or complete failure. The small spring and valve mechanism are susceptible to this buildup, which can impair their movement and eventually cause them to seize. Because the part is relatively inexpensive and easy to access on most outboards, you can replace it easily and maintain your engine’s reliability.
We recommend that boat owners replace the thermostats in their outboards every 100 hours of operation or annually, whichever comes first. This preventative measure resets the baseline for your cooling system and effectively eliminates the risk of a thermostat-related failure. Think of it as cheap insurance against a multi-thousand-dollar engine repair.
Owners of Yamaha outboards and other modern engines should adhere to a strict maintenance schedule to protect their investment and ensure trouble-free time on the water. If you act before problems arise, you can ensure the entire cooling system functions as designed and prevent the damaging effects of incorrect operating temperatures.

Shipping

We are one of the most credible outboard thermostat manufacturers and suppliers in China, specialized in providing high quality customized service. We warmly welcome you to wholesale outboard thermostat for sale here from our factory. For quotation, contact us now.
